final DeleteRequestBuilder mockDeleteBuilder = mock(DeleteRequestBuilder.class);

        final ClearScrollRequestBuilder mockClearScrollBuilder = mock(ClearScrollRequestBuilder.class);

        // Setup search response with one hit
        when(mockClient.prepareSearch("test-index")).thenReturn(mockSearchBuilder);
        when(mockSearchBuilder.setScroll(any(Scroll.class))).thenReturn(mockSearchBuilder);

Ainda é possível usar `BackgroundTask` sozinho no FastAPI, mas você precisa criar o objeto no seu código e retornar uma `Response` da Starlette incluindo-o.

Você pode ver mais detalhes na <a href="https://www.starlette.dev/background/" class="external-link" target="_blank">documentação oficial da Starlette para tarefas em segundo plano</a>.

    /**
     * Sends a DCERPC fragment and receives the response in a single operation
     * @param out the outgoing buffer containing the request
     * @param off the offset into the outgoing buffer
     * @param length the length of data to send
     * @param inB the buffer to receive the response
     * @return the number of bytes received

    }

    @Test
    @DisplayName("SMB version detection via flag or response type")
    void isSMB2_variants() throws Exception {
        // 1) smb2 flag set
        setField(transport, "smb2", true);
        assertTrue(transport.isSMB2());

        // 2) smb2 false but negotiated is SMB2 response
        setField(transport, "smb2", false);

    /**
     * Sent by the server in the Type 2 message to indicate that it is
     * including a Target Information block in the message. The Target
     * Information block is used in the calculation of the NTLMv2 response.
     */
    int NTLMSSP_NEGOTIATE_TARGET_INFO = 0x00800000;

    /**
     * Indicates that the NTLM version is included in the message.
     */
    int NTLMSSP_NEGOTIATE_VERSION = 0x2000000;

///

Luego podemos crear un `AsyncClient` con la app y enviar requests asíncronos a ella, usando `await`.

{* ../../docs_src/async_tests/app_a_py39/test_main.py hl[9:12] *}

Esto es equivalente a:

```Python
response = client.get('/')
```

...que usábamos para hacer nuestros requests con el `TestClient`.

/// tip | Consejo

Nota que estamos usando async/await con el nuevo `AsyncClient`: el request es asíncrono.

///

                if (artifact.getVersion() == null) {
                    // set the recommended version
                    ArtifactVersion selected = artifact.getSelectedVersion();
                    // MNG-2123: null is a valid response to getSelectedVersion, don't
                    // assume it won't ever be.
                    if (selected != null) {
                        artifact.selectVersion(selected.toString());
                    } else {

…то, поскольку у `description` есть значение по умолчанию, даже если вы **ничего не вернёте** для этого поля, оно всё равно будет иметь это **значение по умолчанию**.

### Модель для данных ответа { #model-for-output-response-data }

Если поработать с интерактивной документацией и посмотреть ответ, то, хотя код ничего не добавил в одно из полей `description`, JSON‑ответ содержит значение по умолчанию (`null`):

<div class="screenshot">

labels.start=Start
labels.loginRequired=Login Required
labels.loginLink=Show Login Link
labels.threadName=Thread Name
labels.url=URL
labels.userFavorite=Favorite Log
labels.userInfo=User Info
labels.webApiJson=JSON Response
labels.webConfigName=Web Crawl Config Name
labels.allLanguages=All Languages
labels.dictId=Dictionary ID
labels.docId=Document ID
labels.endTime=End Time
labels.hq=hq
labels.inputs=Inputs

ption":"","kibanaSavedObjectMeta":{"searchSourceJSON":"{\"query\":{\"query\":\"\",\"language\":\"kuery\"},\"filter\":[],\"indexRefName\":\"kibanaSavedObjectMeta.searchSourceJSON.index\"}"},"title":"average-response-time","uiStateJSON":"{}","version":1,"visState":"{\"title\":\"average-response-time\",\"type\":\"area\",\"params\":{\"type\":\"area\",\"grid\":{\"categoryLines\":false},\"categoryAxes\":[{\"id\":\"CategoryAxis-1\",\"type\":\"category\",\"position\":\"bottom\",\"show\":true,\"style\":{...